8939891601 has 9 divisors (see below), whose sum is σ = 12913586491. Its totient is φ = 5959738632.

The previous prime is 8939891593. The next prime is 8939891603. The reversal of 8939891601 is 1061989398.

The square root of 8939891601 is 94551.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1111889025 + 7828002576 = 33345^2 + 88476^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 8939891601 - 2³ = 8939891593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8939891603) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 267895 + ... + 299411.

Almost surely, 2^8939891601 is an apocalyptic number.

8939891601 is the 94551-st square number.

8939891601 is the 47276-th centered octagonal number.

It is an amenable number.

8939891601 is a deficient number, since it is larger than the sum of its proper divisors (3973694890).

8939891601 is an frugal number, since it uses more digits than its factorization.

8939891601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63040 (or 31520 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The cubic root of 8939891601 is about 2075.4427158914.

The spelling of 8939891601 in words is "eight billion, nine hundred thirty-nine million, eight hundred ninety-one thousand, six hundred one".